Pronounced seismic heterogeneity in the interior of the Earth is detected and imaged with high-resolution seismic data from controlled source seismology acquired with dense station spacing and at high frequency, such as the Sovjet Peaceful Nuclear Explosion (PNE) data set. This data can focus on details at selected depth intervals. Mantle body waves indicate pronounced heterogeneity at four depth levels, whereas other depth intervals appear transparent at the considered frequency band of 0.5-15 Hz. We model characteristic scale lengths and velocity contrasts by application of 2D Finite Difference simulation of seismic wave propagation. This talk will discuss teleseismic Pn wave identified in cratonic regions, the Low-Velocity Zone (LVZ) in the lithosphere mantle, significant scattering from around the top of the Mantle Transition Zone, and seismic high-frequency reflections (up-to 4.5 Hz) observed from the Core-Mantle Boundary (CMB), respectively.